Green’s Dictionary of Slang

(S.Afr.) a male homosexual.

1965		Rand Daily Mail I8 Oct. 4: Did you hear prisoners talking about sodomy? — Yes ... These people were called by various names? — Yes. Like ‘hawk’ and ‘Haasie’? – That’s correct [DSAE].
1974		H. Levin Bandiet 131: Most groups of banfiete planning a break from the courts liked to take with them one ‘hasie/bum-boy’ (homosexual): it was easier for him to ‘bottle’ the key. [...] To ‘bottle’ something is to hide it up your arse.
1987		Frontline Oct.–Nov. 11: The Hawks were the masculine guys [...] The Lighties, or Haase (rabbits) were the passive ones, mainly ignorant youngsters selling their orifices and smooth youthful skins for food, tobacco, drugs and protection [DSAE].